.container {
  display: flex;
  width: 600px;
  min-height: 250px;
  padding: 16px;
  box-sizing: border-box;
  background: #fff;
  font-family: Arial, sans-serif;
}
.left, .center, .right {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  margin: 0 12px;
}
.left {
  flex: 1;
}
.center {
  flex: 1;
  min-width: 120px;
}
.right {
  flex: 1;
  align-items: center;
}
#qr-input {
  width: 100%;
  height: 120px;
  resize: vertical;
  font-size: 16px;
  padding: 8px;
}
label {
  margin-bottom: 12px;
  font-size: 15px;
}
#qr-code {
  margin-bottom: 12px;
  min-height: 200px;
  min-width: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#download-btn {
  padding: 8px 16px;
  font-size: 15px;
  background: #1976d2;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}
#download-btn:hover {
  background: #1565c0;
}
.popup-title {
  font-size: 22px;
  font-weight: bold;
  text-align: center;
  margin-top: 12px;
  margin-bottom: 10px;
  letter-spacing: 2px;
}
.input-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}
.input-actions button {
  padding: 4px 10px;
  font-size: 14px;
  background: #f5f5f5;
  border: 1px solid #ccc;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.2s;
}
.input-actions button:hover {
  background: #e3e3e3;
}
.param-group {
  margin-bottom: 10px;
  width: 100%;
}
.param-group label {
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 6px;
}
#qr-foreground, #qr-background {
  width: 32px;
  height: 32px;
  border: none;
  background: none;
  padding: 0;
}
#qr-margin {
  width: 60px;
} 